A display device includes: a host which transmits a first signal through a first interface, and transmits a second signal through a second interface different from the first interface; a display driver integrated circuit including a first interface unit which receives the first signal through the first interface, and a second interface unit which receives the second signal through the second interface; and a display panel which receives a data signal corresponding to the first signal and the second signal from the display driver integrated circuit, and displays an image.